原煤选前脱粉技术经济指标探讨

为了解决神东目前煤泥处置存在的混煤水分高、细煤泥难处理、冬季易发生冻车等问题,论述了选前脱粉的可行性。为了找出适合神东目前的脱粉技术,并以大柳塔选煤厂活井系统为例,从技术经济方面系统分析了脱粉前后煤泥量、材料费、煤泥处理设备等变化情况,发现按照25mm和13mm分级,分别可以多收益1.46亿元和1.07亿元。结果表明：选前脱粉降低了煤泥处理系统负荷,简化了煤泥处理工艺,降低了煤泥处理费用,提高了末煤系统入洗能力,提高了精煤分选精度、商品煤产率提高了1.02%,降低了混煤水分1.04%。

Economic and technical feasibility of raw coal desliming before preparation

There are lots of problems existed in slurry process in Shenhua Shendong Coal Group Co.,Ltd.,including high moisture in mixed coal,large fine slime in clean coal,frequent coal freezing in vehicle in the winter.Analyse the feasibility of desliming before preparation.To select the proper desliming technology,taking Daliuta coal preparation plant as sample,investigate the changes of slime content,materials cost and slime processing facilities before and after desliming.Classify the coal size by 25 mm and 13 mm,the benefits increase by 1.46×108 yuan and 1.07×108 yuan respectively.The results show that,these measures decrease the load of slime processing system and processing expense,simplify the technological process,improve the slack coal treatment capacity and separation precision of clean coal,the yield of commercial coal increase by 1.02 percent,the moisture of mixed coal decrease by 1.04 percent.